Gravimetric Analysis for Barium Sulfate

Document Type:Coursework

Subject Area:Chemistry

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Calculating the percentage of the sulfate ions by percentage in the solution containing the unknown sulfate salt through stoichiometric analysis of the sample collected. This percentage will be used in the identification of the metal M that is present in the sulfate salt. Introduction Gravimetric analysis refers to a qualitative research method that is used in determining the amounts of substance via the use of selective precipitation. A precipitate is obtained after the separation from the aqueous solution. In the experiment, if the chemical formula of the obtained sample is known, then we can determine the mass of the original sample. Theory- Lab Notes In this experiment, we will consider the application of double displacement reactions. One of the components in the reaction will react, exchanging molecules with the other so as to form products.

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Anions and cations during the experiment will switch places and the result will be two or more totally different products. Below is a general illustration of the reaction we will be expecting in the experiment. This type of reaction will take place in aqueous solutions. 35 grams of the unknown substance in the beaker, followed by 50 ML of distilled water. Next, add 3ML of the 1:1 M HCl in the sample beaker. Stir it till all contents are dissolved. You are then required to heat the solution in the beaker on the wire screen and the beaker. While heating the solution, add 80 ML of the 0. Therefore, a=1, b=1 Discussion The solution that was added to the barium chloride contained sulfate have more energy of dissociation as compared to the chloride ions.

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